V$SESSION

This view lists session information for each current session.

Column

Datatype

Description

SADDR

RAW(4 | 8)

Session address

SID

NUMBER

Session identifier

SERIAL#

NUMBER

Session serial number. Used to uniquely identify a session's objects. Guarantees that session-level commands are applied to the correct session objects if the session ends and another session begins with the same session ID.

AUDSID

NUMBER

Auditing session ID

PADDR

RAW(4 | 8)

Address of the process that owns the session

USER#

NUMBER

Oracle user identifier

USERNAME

VARCHAR2(30)

Oracle username

COMMAND

NUMBER

Command in progress (last statement parsed); for a list of values, see Table 5-5. These values also appear in the AUDIT_ACTIONS table.

OWNERID

NUMBER

The column contents are invalid if the value is 2147483644. Otherwise, this column contains the identifier of the user who owns the migratable session.

For operations using Parallel Slaves, interpret this value as a 4-byte value. The low-order 2 bytes of which represent the session number, and the high-order bytes the instance ID of the query coordinator.

TADDR

VARCHAR2(8)

Address of transaction state object

LOCKWAIT

VARCHAR2(8)

Address of lock waiting for; null if none

STATUS

VARCHAR2(8)

Status of the session:

ACTIVE - Session currently executing SQL

INACTIVE

KILLED - Session marked to be killed

CACHED - Session temporarily cached for use by Oracle*XA

SNIPED - Session inactive, waiting on the client

SERVER

VARCHAR2(9)

Server type (DEDICATED| SHARED| PSEUDO| NONE)

SCHEMA#

NUMBER

Schema user identifier

SCHEMANAME

VARCHAR2(30)

Schema user name

OSUSER

VARCHAR2(30)

Operating system client user name

PROCESS

VARCHAR2(12)

Operating system client process ID

MACHINE

VARCHAR2(64)

Operating system machine name

TERMINAL

VARCHAR2(30)

Operating system terminal name

PROGRAM

VARCHAR2(48)

Operating system program name

TYPE

VARCHAR2(10)

Session type

SQL_ADDRESS

RAW(4 | 8)

Used with SQL_HASH_VALUE to identify the SQL statement that is currently being executed

SQL_HASH_VALUE

NUMBER

Used with SQL_ADDRESS to identify the SQL statement that is currently being executed

SQL_ID

VARCHAR2(13)

SQL identifier of the SQL statement that is currently being executed

SQL_CHILD_NUMBER

NUMBER

Child number of the SQL statement that is currently being executed

PREV_SQL_ADDR

RAW(4 | 8)

Used with PREV_HASH_VALUE to identify the last SQL statement executed

PREV_HASH_VALUE

NUMBER

Used with SQL_HASH_VALUE to identify the last SQL statement executed

PREV_SQL_ID

VARCHAR2(13)

SQL identifier of the last SQL statement executed

PREV_CHILD_NUMBER

NUMBER

Child number of the last SQL statement executed

MODULE

VARCHAR2(48)

Name of the currently executing module as set by calling the DBMS_APPLICATION_INFO.SET_MODULE procedure

MODULE_HASH

NUMBER

Hash value of the above MODULE

ACTION

VARCHAR2(32)

Name of the currently executing action as set by calling the DBMS_APPLICATION_INFO.SET_ACTION procedure

ACTION_HASH

NUMBER

Hash value of the above action name

CLIENT_INFO

VARCHAR2(64)

Information set by the DBMS_APPLICATION_INFO.SET_CLIENT_INFO procedure

FIXED_TABLE_SEQUENCE

NUMBER

This contains a number that increases every time the session completes a call to the database and there has been an intervening select from a dynamic performance table. This column can be used by performance monitors to monitor statistics in the database. Each time the performance monitor looks at the database, it only needs to look at sessions that are currently active or have a higher value in this column than the highest value that the performance monitor saw the last time. All the other sessions have been idle since the last time the performance monitor looked at the database.

ROW_WAIT_OBJ#

NUMBER

Object ID for the table containing the row specified in ROW_WAIT_ROW#

ROW_WAIT_FILE#

NUMBER

Identifier for the datafile containing the row specified in ROW_WAIT_ROW#. This column is valid only if the session is currently waiting for another transaction to commit and the value of ROW_WAIT_OBJ# is not -1.

ROW_WAIT_BLOCK#

NUMBER

Identifier for the block containing the row specified in ROW_WAIT_ROW#. This column is valid only if the session is currently waiting for another transaction to commit and the value of ROW_WAIT_OBJ# is not -1.

ROW_WAIT_ROW#

NUMBER

Current row being locked. This column is valid only if the session is currently waiting for another transaction to commit and the value of ROW_WAIT_OBJ# is not -1.

LOGON_TIME

DATE

Time of logon

LAST_CALL_ET

NUMBER

Last call

PDML_ENABLED

VARCHAR2(3)

This column has been replaced by column PDML_STATUS

FAILOVER_TYPE

VARCHAR2(13)

Indicates whether and to what extent transparent application failover (TAF) is enabled for the session:

NONE - Failover is disabled for this session

SESSION - Client is able to fail over its session following a disconnect

A nonzero value is the session's last wait time. A zero value means the session is currently waiting.

SECONDS_IN_WAIT

NUMBER

If WAIT_TIME = 0, then SECONDS_IN_WAIT is the seconds spent in the current wait condition. If WAIT_TIME0, then SECONDS_IN_WAIT is the seconds since the start of the last wait, and SECONDS_IN_WAIT - WAIT_TIME / 100 is the active seconds since the last wait ended.